用于CGM(计算机图形图元文件)格式的.NET或C#库?

时间:2011-01-27 06:40:41

标签: .net

是否有人知道用于在WinForms和Microsoft Service Reports / CrystalReports中显示CGM文件的.NET C#库,以便它也可以打印?

如果它还能够将文件转换为jpeg,gif,png等网络友好的图形格式,那将非常有用。

这可能是来自.NET Library for CGM File Conversion的重复问题,但OP没有标记答案,也没有建议的解决方案.NET兼容。

所以我只是再试一次运气。谢谢你的帮助。

1 个答案:

答案 0 :(得分:3)

我只想与SO分享这个临时黑客。如果可能的话,我仍然需要一个合适的库(在所有在线提供.NET excel教程的人都可以获得积分):

using System;
using Excel = Microsoft.Office.Interop.Excel;
using Microsoft.Office.Core;
using System.Drawing;

namespace CGM

{
    public class CGMConverter 
    {
        Image _mImage;

        public Image Image { get { return _mImage; } }

        public CGMConverter(string cgm, float width, float height)
        {
            object misValue = System.Reflection.Missing.Value;
            Excel.Application xlsApp = null;
            Excel.Workbook xlsWorkBook = null;
            Excel.Worksheet xlsWorkSheet = null;

            try
            {
                xlsApp = new Excel.ApplicationClass();
                xlsWorkBook = xlsApp.Workbooks.Add(misValue);
                xlsWorkSheet = (Excel.Worksheet)xlsWorkBook.Sheets["sheet1"];
                xlsWorkSheet.Shapes.AddPicture(cgm, MsoTriState.msoFalse, MsoTriState.msoTrue, 50, 50, width, height);
                xlsWorkSheet.Shapes.Item(0).Copy();
                _mImage = System.Windows.Forms.Clipboard.GetImage();
            }
            catch(Exception e)
            {
                throw (e);
            }
            finally
            {
                xlsApp.DisplayAlerts = false;
                xlsApp.Quit();
                releaseObject(xlsWorkSheet);
                releaseObject(xlsWorkBook);
                releaseObject(xlsApp);
            }
        }

        private void releaseObject(object obj)
        {
            try
            {
                System.Runtime.InteropServices.Marshal.ReleaseComObject(obj);
                obj = null;
            }
            catch (Exception ex)
            {
                obj = null;
            }
            finally
            {
                GC.Collect();
            }
        }
    }
}